def copy_file(src, dest):
    src_f = open('data/' + src, 'r', encoding='utf-8')
    s = src_f.read()
    src_f.close()

    dest_f = open('data/' + dest, 'w', encoding='utf-8')
    dest_f.write(s)
    dest_f.close()


copy_file('ccc.txt', 'ddd.txt')
